In nature, gemstones are usually located inside rocks or in the depth of the earth, and they come in a variety of types and colors.
Diamond is also a gemstone, but in this category I will only refer to colored or colorless gemstones that are not diamonds. There is a wide range of types, colors and prices for gemstone necklaces, such as green emerald, red ruby, blue, green and pink sapphire, pink morganite, azure aqua marine, blue topaz, granites in purple and orange, pearls and so on.